Grid-Connected Three-Phase Inverter Control (C2000 F28379D)

Project Overview

This project implements a digital control system for a 10 kVA Three-Phase Grid-Connected Inverter (GCI) using the TI C2000 F28379D LaunchPad. The system is designed to inject 3 kW of active power and 3 kVAR of reactive power into a 415V, 50Hz grid.

The implementation utilizes a Synchronous Reference Frame (SRF) PLL for grid synchronization and a dq-frame current controller to regulate power injection. The control algorithms are discretized using the Tustin (Bilinear) transformation and executed in a Processor-in-the-Loop (PIL) configuration.

Key Features

• SRF-PLL: Grid synchronization using a PI-based Phase Locked Loop in the dq-frame.
• Current Control: Decoupled inner current control loops ($i_d$, $i_q$) for precise regulation.
• Power Control: Outer control loops for Active (P) and Reactive (Q) power tracking.
• Plant Modeling: Discrete-time simulation of the L-filter and grid dynamics running directly on the MCU for PIL testing.

Documentation & Code

• Full Technical Report: View PDF - Detailed IEEE-style report covering the mathematical modeling, control loop design, and PIL results.
• Source Code: View Source - Complete C implementation for the TMS320F28379D MCU.

Technical Specifications

Parameter	Value
Grid Voltage	415V (Line-Line), 50 Hz
DC Bus Voltage	800 V
Switching Frequency	10 kHz
Controller	PI (Tustin Discretized)

How to Run

1. Hardware Setup: Connect the TI F28379D LaunchPad to your PC.
2. Software: Import the src files into Code Composer Studio (CCS).
3. PIL Simulation: The code is set to PIL Mode. Use the CCS Expression Window to change pref (Active Power) or qref (Reactive Power) in real-time.

Author

Rohan - Electrical Engineering